Abstract: A system and method for measuring golf ball trajectory characteristics is disclosed. A device may collect a user and ball magnetometer and accelerometer frame of reference vectors. A device may calculate frame of rotation coefficients from the user magnetometer frame of reference vector, the user accelerometer frame of reference vector, the ball magnetometer frame of reference vector, and the ball accelerometer frame of reference vector using a Kabsch Algorithm. A device may collect a ball magnetometer time series matrix from the ball magnetometer as the ball is in flight. A device may process the ball magnetometer time series through a Rodrigues Rotation Formula using the frame rotation coefficients to create a rotation vector. A device may calculate a prior vector difference and a second prior vector difference. A device may calculate the spin axes by multiplying the prior vector difference by the second prior vector difference.

Abstract: A method and system for charging an electronic golf ball are described herein. The system is made up of a charging apparatus and an electronic golf ball. The charging apparatus includes a holder for holding the electronic golf ball, a power transmitting apparatus mounted within the holder, the power transmitting apparatus encircling an area where the electronic golf ball is located when the electronic golf ball is to be charged, and a power supply electrically connected to the power transmitting device. The electronic golf ball includes an outer shell, a ball core covered by the outer shell, a power receiving apparatus within the ball core, wherein the power receiving apparatus receives power wirelessly from the power transmitting apparatus, a printed circuit board electrically connected to the power receiving apparatus, and a battery connected to the printed circuit board.

Abstract: A system for measuring golf ball trajectory characteristics is disclosed. The system includes artificial grass with a launch location for a golf ball and a plurality of wide-angle distance optical sensors mechanically connected to the artificial grass positioned such that a field of measurement of each wide-angle distance optical sensors intersects.

Abstract: A golf ball with embedded electronics to allow proximity to be tracked and to monitor golfer performance is disclosed. The golf ball comprises a processor connected to an accelerometer, communications circuitry, a spin detector, and memory, wherein the processor stores accelerometer data from the accelerometer and rotation data regarding rotation of the spin detector in the memory. The processor converts the data regarding the rotation of the spin detector into a rotation speed and a rotation direction, said rotation speed determined by a frequency of the data, and said rotation direction determined by a magnitude of the data. The communications circuitry is configured to communicate the accelerometer data, the rotation direction, and the rotation speed to a central interrogator for analysis of a golfer's performance.

Abstract: A golf ball with embedded electronics to allow proximity to be tracked and to monitor golfer performance is disclosed. The golf ball comprises a processor connected to an accelerometer, communications circuitry, a spin detector, and memory, wherein the processor stores accelerometer data from the accelerometer and rotation data regarding rotation of the spin detector in the memory. The processor converts the data regarding the rotation of the spin detector into a rotation speed and a rotation direction, said rotation speed determined by a frequency of the data, and said rotation direction determined by a magnitude of the data. The communications circuitry is configured to communicate the accelerometer data, the rotation direction, and the rotation speed to a central interrogator for analysis of a golfer's performance.

Abstract: A Bluetooth chip designed to track proximity and play a sound, along with an accelerometer, that is embedded inside of a golf ball is disclosed. The technology inside the balls allows it to be found quickly through proximity and sound, and the app gives a golfer helpful analytical data.